The properties or qualities of a room or building that determine how sound is transmitted in it.
A medicine or other agent to assist hearing.
Utilizing sound energy in its operation.
(of building materials) Used for soundproofing or modifying sound.
(of an explosive mine or other weapon) Able to be set off by sound waves.
Naturally producing or produced by an instrument without electrical amplification or the need thereof.
A genre descended from rock music, characterized by massive sound, highly amplified distortion, and overall loudness, often with extended guitar solos, and lyrics that involve aggressive or fantastic imagery.
Any metal that has a specific gravity greater than about 5, especially one, such as lead, that is poisonous and may be a hazard in the environment. (There are many different definitions of what counts as a heavy metal; see Heavy metals for a discussion.)
Great influence or power.
guns or shot of large size.